OK. no SSD.
Then do u use an HDD with 2 to 3 or even more available gigs of space? as most do.
Obsessive Compulsive Much? Not an insult at all.
Because if it is as U said "Temp.file" what is ur real problem with it? Space being at such a premium on ur PC is the real issue, this has been resolved long ago. making this a mute point. the answer being get a bigger drive or SSD. and stop with the OCD. ur choice of file mngr. was a better one a long time ago. now we have moved on u should too.